18261016 has 8 divisors (see below), whose sum is σ = 34239420. Its totient is φ = 9130504.

The previous prime is 18261013. The next prime is 18261029. The reversal of 18261016 is 61016281.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18261013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1141306 + ... + 1141321.

Almost surely, 2^18261016 is an apocalyptic number.

It is an amenable number.

18261016 is a deficient number, since it is larger than the sum of its proper divisors (15978404).

18261016 is a wasteful number, since it uses less digits than its factorization.

18261016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282633 (or 2282629 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 18261016 is about 4273.2910034305. The cubic root of 18261016 is about 263.3348345087.

Adding to 18261016 its reverse (61016281), we get a palindrome (79277297).

The spelling of 18261016 in words is "eighteen million, two hundred sixty-one thousand, sixteen".